6404187 has 8 divisors (see below), whose sum is σ = 8593936. Its totient is φ = 4241952.

The previous prime is 6404179. The next prime is 6404191. The reversal of 6404187 is 7814046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6404187 - 2³ = 6404179 is a prime.

It is a super-2 number, since 2×6404187² = 82027222261938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6404117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6328 + ... + 7269.

It is an arithmetic number, because the mean of its divisors is an integer number (1074242).

Almost surely, 2^6404187 is an apocalyptic number.

6404187 is a deficient number, since it is larger than the sum of its proper divisors (2189749).

6404187 is a wasteful number, since it uses less digits than its factorization.

6404187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13757.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 6404187 is about 2530.6495213680. The cubic root of 6404187 is about 185.7040327109.

The spelling of 6404187 in words is "six million, four hundred four thousand, one hundred eighty-seven".